diff --git a/networking/tls_pstm.h b/networking/tls_pstm.h
new file mode 100644
index 0000000..1affc1b
--- /dev/null
+++ b/networking/tls_pstm.h
@@ -0,0 +1,238 @@
+/**
+ *	@file    pstm.h
+ *	@version 33ef80f (HEAD, tag: MATRIXSSL-3-7-2-OPEN, tag: MATRIXSSL-3-7-2-COMM, origin/master, origin/HEAD, master)
+ *
+ *	multiple-precision integer library.
+ */
+/*
+ *	Copyright (c) 2013-2015 INSIDE Secure Corporation
+ *	Copyright (c) PeerSec Networks, 2002-2011
+ *	All Rights Reserved
+ *
+ *	The latest version of this code is available at http://www.matrixssl.org
+ *
+ *	This software is open source; you can redistribute it and/or modify
+ *	it under the terms of the GNU General Public License as published by
+ *	the Free Software Foundation; either version 2 of the License, or
+ *	(at your option) any later version.
+ *
+ *	This General Public License does NOT permit incorporating this software
+ *	into proprietary programs.  If you are unable to comply with the GPL, a
+ *	commercial license for this software may be purchased from INSIDE at
+ *	http://www.insidesecure.com/eng/Company/Locations
+ *
+ *	This program is distributed in WITHOUT ANY WARRANTY; without even the
+ *	implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *	See the GNU General Public License for more details.
+ *
+ *	You should have received a copy of the GNU General Public License
+ *	along with this program; if not, write to the Free Software
+ *	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *	http://www.gnu.org/copyleft/gpl.html
+ */
+/******************************************************************************/
+
+#ifndef _h_PSTMATH
+#define _h_PSTMATH
+#ifndef DISABLE_PSTM
+
+/* Define this here to avoid including circular limits.h on some platforms */
+#ifndef CHAR_BIT
+#define CHAR_BIT	8
+#endif
+
+/******************************************************************************/
+/*
+	If native 64 bit integers are not supported, we do not support 32x32->64
+	in hardware, so we must set the 16 bit flag to produce 16x16->32 products.
+*/
+#ifndef HAVE_NATIVE_INT64
+	#define PSTM_16BIT
+#endif /* ! HAVE_NATIVE_INT64 */
+
+/******************************************************************************/
+/*
+	Some default configurations.
+
+	pstm_word should be the largest value the processor can hold as the product
+		of a multiplication. Most platforms support a 32x32->64 MAC instruction,
+		so 64bits is the default pstm_word size.
+	pstm_digit should be half the size of pstm_word
+ */
+#ifdef PSTM_8BIT
+/*	8-bit digits, 16-bit word products */
+	typedef unsigned char		pstm_digit;
+	typedef unsigned short		pstm_word;
+	#define DIGIT_BIT			8
+
+#elif defined(PSTM_16BIT)
+/*	16-bit digits, 32-bit word products */
+	typedef unsigned short		pstm_digit;
+	typedef unsigned long		pstm_word;
+	#define	DIGIT_BIT			16
+
+#elif defined(PSTM_64BIT)
+/*	64-bit digits, 128-bit word products */
+	#ifndef __GNUC__
+	#error "64bit digits requires GCC"
+	#endif
+	typedef unsigned long		pstm_digit;
+	typedef unsigned long		pstm_word __attribute__ ((mode(TI)));
+	#define DIGIT_BIT			64
+
+#else
+/*	This is the default case, 32-bit digits, 64-bit word products */
+	typedef uint32			pstm_digit;
+	typedef uint64			pstm_word;
+	#define DIGIT_BIT		32
+	#define PSTM_32BIT
+#endif /* digit and word size */
+
+#define PSTM_MASK			(pstm_digit)(-1)
+#define PSTM_DIGIT_MAX		PSTM_MASK
+
+/******************************************************************************/
+/*
+	equalities
+ */
+#define PSTM_LT			-1		/* less than */
+#define PSTM_EQ			0		/* equal to */
+#define PSTM_GT			1		/* greater than */
+
+#define PSTM_ZPOS		0		/* positive integer */
+#define PSTM_NEG		1		/* negative */
+
+#define PSTM_OKAY		PS_SUCCESS
+#define PSTM_MEM		PS_MEM_FAIL
+
+/******************************************************************************/
+/*
+	Various build options
+ */
+#define PSTM_DEFAULT_INIT 64		/* default (64) digits of allocation */
+#define PSTM_MAX_SIZE	4096
+
+typedef struct  {
+	int16	used, alloc, sign;
+	pstm_digit	*dp;
+	psPool_t	*pool;
+} pstm_int;
+
+/******************************************************************************/
+/*
+	Operations on large integers
+ */
+#define pstm_iszero(a) (((a)->used == 0) ? PS_TRUE : PS_FALSE)
+#define pstm_iseven(a) (((a)->used > 0 && (((a)->dp[0] & 1) == 0)) ? PS_TRUE : PS_FALSE)
+#define pstm_isodd(a)  (((a)->used > 0 && (((a)->dp[0] & 1) == 1)) ? PS_TRUE : PS_FALSE)
+#define pstm_abs(a, b)  { pstm_copy(a, b); (b)->sign  = 0; }
+
+extern void pstm_set(pstm_int *a, pstm_digit b);
+
+extern void pstm_zero(pstm_int * a);
+
+extern int32 pstm_init(psPool_t *pool, pstm_int * a);
+
+extern int32 pstm_init_size(psPool_t *pool, pstm_int * a, uint32 size);
+
+extern int32 pstm_init_copy(psPool_t *pool, pstm_int * a, pstm_int * b,
+				int16 toSqr);
+
+extern int16 pstm_count_bits (pstm_int * a);
+
+extern int32 pstm_init_for_read_unsigned_bin(psPool_t *pool, pstm_int *a,
+				uint32 len);
+
+extern int32 pstm_read_unsigned_bin(pstm_int *a, unsigned char *b, int32 c);
+
+extern int32 pstm_unsigned_bin_size(pstm_int *a);
+
+extern int32 pstm_copy(pstm_int * a, pstm_int * b);
+
+extern void pstm_exch(pstm_int * a, pstm_int * b);
+
+extern void pstm_clear(pstm_int * a);
+
+extern void pstm_clear_multi(pstm_int *mp0, pstm_int *mp1, pstm_int *mp2,
+				pstm_int *mp3, pstm_int *mp4, pstm_int *mp5, pstm_int *mp6,
+				pstm_int *mp7);
+
+extern int32 pstm_grow(pstm_int * a, int16 size);
+
+extern void pstm_clamp(pstm_int * a);
+
+extern int32 pstm_cmp(pstm_int * a, pstm_int * b);
+
+extern int32 pstm_cmp_mag(pstm_int * a, pstm_int * b);
+
+extern void pstm_rshd(pstm_int *a, int16 x);
+
+extern int32 pstm_lshd(pstm_int * a, int16 b);
+
+extern int32 pstm_div(psPool_t *pool, pstm_int *a, pstm_int *b, pstm_int *c,
+				pstm_int *d);
+
+extern int32 pstm_div_2d(psPool_t *pool, pstm_int *a, int16 b, pstm_int *c,
+				pstm_int *d);
+
+extern int32 pstm_div_2(pstm_int * a, pstm_int * b);
+
+extern int32 s_pstm_sub(pstm_int *a, pstm_int *b, pstm_int *c);
+
+extern int32 pstm_sub(pstm_int *a, pstm_int *b, pstm_int *c);
+
+extern int32 pstm_sub_d(psPool_t *pool, pstm_int *a, pstm_digit b, pstm_int *c);
+
+extern int32 pstm_mul_2(pstm_int * a, pstm_int * b);
+
+extern int32 pstm_mod(psPool_t *pool, pstm_int *a, pstm_int *b, pstm_int *c);
+
+extern int32 pstm_mulmod(psPool_t *pool, pstm_int *a, pstm_int *b, pstm_int *c,
+				pstm_int *d);
+
+extern int32 pstm_exptmod(psPool_t *pool, pstm_int *G, pstm_int *X, pstm_int *P,
+				pstm_int *Y);
+
+extern int32 pstm_2expt(pstm_int *a, int16 b);
+
+extern int32 pstm_add(pstm_int *a, pstm_int *b, pstm_int *c);
+
+extern int32 pstm_to_unsigned_bin(psPool_t *pool, pstm_int *a,
+				unsigned char *b);
+
+extern int32 pstm_to_unsigned_bin_nr(psPool_t *pool, pstm_int *a,
+				unsigned char *b);
+
+extern int32 pstm_montgomery_setup(pstm_int *a, pstm_digit *rho);
+
+///bbox: pool unused
+#define pstm_montgomery_reduce(pool, a, m, mp, paD, paDlen) \
+        pstm_montgomery_reduce(      a, m, mp, paD, paDlen)
+extern int32 pstm_montgomery_reduce(psPool_t *pool, pstm_int *a, pstm_int *m,
+				pstm_digit mp, pstm_digit *paD, uint32 paDlen);
+
+#define pstm_mul_comba(pool, A, B, C, paD, paDlen) \
+        pstm_mul_comba(      A, B, C, paD, paDlen)
+extern int32 pstm_mul_comba(psPool_t *pool, pstm_int *A, pstm_int *B,
+				pstm_int *C, pstm_digit *paD, uint32 paDlen);
+
+///bbox: pool unused
+#define pstm_sqr_comba(pool, A, B, paD, paDlen) \
+        pstm_sqr_comba(      A, B, paD, paDlen)
+extern int32 pstm_sqr_comba(psPool_t *pool, pstm_int *A, pstm_int *B,
+				pstm_digit *paD, uint32 paDlen);
+
+extern int32 pstm_cmp_d(pstm_int *a, pstm_digit b);
+
+extern int32 pstm_montgomery_calc_normalization(pstm_int *a, pstm_int *b);
+
+extern int32 pstm_mul_d(pstm_int *a, pstm_digit b, pstm_int *c);
+
+extern int32 pstm_invmod(psPool_t *pool, pstm_int * a, pstm_int * b,
+				pstm_int * c);
+
+#else /* DISABLE_PSTM */
+	typedef int32 pstm_int;
+#endif /* !DISABLE_PSTM */
+#endif /* _h_PSTMATH */
+